Fluid-pressure-operated tool



Aug. 10 1926-. 1,595,572 v I E. PENB ERTHY FLUID PRESSURE} OPERATED TOOL Filed Feb. 28.1921 2 Sputq-Sheet 1 mlmmf Aug. 10 1926. 1,595,572

E. PENBERTHY v mum Pagssun's OPERATED TOOL Filed Feb. 28 1921 z shun-shut 2 7 Patented Aug. 10,1926 p UNITED STATES ERNEST TENBE'RTHY, or DETROIT, mrcnman, assionon. To CHICAGO PNEUMATIC TOOL COMPANY, or DETROIT, MICHIGAN, A oonronATIon on NEW msm'.

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Application filed February 28, 1921. Serial No. 48,498.

My invention pertains to fluid pressure operated tools such as,pbut 'not necessarily, rock drills and the like and such invention has relation to the steel or working tool retainer positionedat the front end of the tool for retaining the working element or tool in place, but adapted to be swung free therefrom when it is desired to remove it from the drill or other machine. Another object of my invention is to provide at the same time a bolt lock for locking the front I head bolts of the drill and also at the same vention embodied therein; Fig. 2 a side ele-- vation thereof; Fig. 3 an end View thereof; Fig. 4 an elevation of the supporting plate detached; Figs. 5 and 6 detail views of thebolt and nut constituting the head bolts of the drill; Figs. 7, 8 and 9 detail views of a modified form of the spring or rod of the retainer and Fig. 10 a. section on the line 10 10 of Fig. 4.

Referring to the particular embodiment of my inventlon as herein shown where the same is applied to a rock drill, the tool retainer proper is associated with the usual front head 1 of a rockdrilhand also with the head bolts 2 and their cushion springs 3, and also the working tool which is here in the form ofa so-called steel 4.

Referring to the tool retainer, the retainer proper comprises a one piece rod or wire which is bent to the form shown in Figs.

1', 2and 3, according to one form, and in Figs. 7 8 and 9 according to another form. Describing the'first form the same coiisists of the central U-shaped portion 5 which when in position straddles the steel as shown in Fig 3, the two opposite parallel portions 6 extending in a direction parallel to the axis of the drill and the tool 4, and the inturned portions 7 terminating in outwardly extending bearing ends 8. i

The retainer proper is pivotally mounted in a plate 9 which in the present instance also serves as a lock plate for the head bolts of the drill as hereinafter described. This plate has a central opening 10 of a diameter so as to freely slip over the front head. 1 of the drill. It is further provided with holes 12 in which the bearing ends 8 of the forwardly extending brackets 11 having retainer are pivoted. As shown in Figs. 4

and 10 these brackets have on their inner faces lugs 13 which are adapted to cooperate with t-he retainer proper particularly for the purpose of reventing accidental displacement of suc retainer.

The brackets 11 aswell as the ivotal points. therein for the retainer are ocated at one side of the longitudinal axis of the tool on steel 4 and the tendency of such retainer is to remainin its normal operative position shown in Fig. 2, thereby cooperating with the drill steel but the same is adapted to be swung to the dotted line posi-L tion shown in said Fig. 2 for the purpose of removal of such steel. The lugs 13 prevent accidental displacement of the retainer,

but when it is desired to open the retainer,

that is swing it to one side, the sides 6 and 7 of such retainer are squeezed inwardly to thereupon slide over .the ln s 13. When the retainer is in closed position as shown in full lines in Fig.2 the inward projecting portions 7 are adapted to rest against the front face of the plate 9 and the Inner face of the brackets 11.

' In Figs. 7, 8 and 9 there is shown a modified form of construction according to which the retainer proper is provided with coils 14:

at the junctions between the U-shaped central portion 15 and the side portions 16. This construction permits of an an lar movement of such central portion as s own by the dotted lines in Fi 8 so that such portion may yieldand bet ereby better able to withstand the shock from the tool as well as any shock from impingement against any object when the tool is not in place.

' The plate 9 serves in the present instance as a bolt lock and means of attachment for the head bolts 2, for which purpose these bolts pass through the holes 17 in such plate and are provided at their ends with the nuts 18 adapted to be locked to the plate by means of the radial projections 19 adjacent the hole 17 and the cooperating radial grooves 20 in the nuts 18. These means prevent the bolts from turning or loosening accidentally. The cushion springs 3 are interposed between the plate 9 and the lugs 21' through which said bolts 2 pass. I claim:

1. In combination with the cylinder of a 1 11 isomers l03l and tool retainer comprising a locking plate, head bolts connected with th cylin fluid pressure operated tool, acombined bolt der and with the plate, a retainer pivotally mounted on said plate, and adapted to retain the working tool, said plate being yieldingly connected with such bolts and cooperating locking means between said head bolts and plate.

2. In combination with the cylinder of a fluid pressure operated tool, a combined bolt lock and tool retainer comprisin a locking plate, lugs on the cylinder, head bolts connected with the cylinder by-said lugs and with the plate, springs inte osed between said lugs and said plate an holding the latter extended on the bolts with respect to the cylinders, a retainer pivotally mounted on said plate and adapted to retain the working tool and cooperating lock-. ing means between said head bolts and plates. l

3. In combination with the'cylinder of a fluid pressure operated tool, a combined bolt lock and toolretainer comprising a locking plate, head bolts connected with the cylinder and with the plate, said plate having an opening so as to fit over the front head and also having holes through which the bolts pass, nuts secured to the ends of the bolts, means yieldingly maintaining said plate in contact with said nuts, said plate and nuts having cooperating locking means, and a retainer pivotally mounted on said plate and adapted to retain the working tool.

a. In combination with the cylinder of a fluid pressure operated tool, a combined bolt lock and tool retainer comprising a locking plate, head bolts connected with the cylinder and with the late, said plate having an opening so as to ht over the front head and also having holes through which the bolts pass, nuts secured to the ends of the bolts, springs encircling said bolts and-interposed between said plate and abutments on said cylinder to retain the plate normally in contact with the said nuts, said plate having projections and said nuts having correspondin grooves, and a retainer pivotally mount on said plate and adapted to retain the working tool.

5. In combination with the cylinder and front head of a fluid pressure operated tool, a tool retainer comprising a support connected with the cylinder, and having forwardly projecting brackets, a retainer proper consisting of a rod having a U-shaped central ortion to fit over the working tool free end portions pivoted in said brackets and intermediate portions on each side of said head, said brackets and the pivotal points therein for the retainer proper being located at one side of the longitudinal axis of the working tool and the distance between the intermediate portions of the GI comprising a support yieldingly mounted against rearward movement on the cylinder, and having forwardly projecting brackets, a retainer proper consisting of a rod having a U-shaped central portion to fit over the working tool and free end por- 15 tions pivoted in said brackets, said rod be ing formedas springs on each side of and immediately adjacent to said U-shaped portion.

7 In combination with the cylinder and front head of a fluid pressure operated tool, head bolts connecting the cylinder and head, a tool retainer comprising a plate and a retainer proper pivotally mounted on. the

plate integrally formed to absorb shocks in one direction, the-plate havin holes through which the bolts project, andiprings on the bolts between said plate and head to absorb the reaction of said retainer and shocks .in the opposite direction.

8. In combination with the cylinder and front head of a fluid pressure operated tool,

head bolts connecting the cylinder and head and having nuts on their ends, a tool retainer comprising a plate and a retainer proper pivotally mounted on the plate, the plate aving holes through which bolts project, springs on the bolts and yieldingly holding said plate against said nuts and cooperating 1'00 locking means on said plate and nuts.

9. In combination with the cylinderand front head of a fluid pressureoperated tool,

head bolts connecting the cylinder and head 1 and having nuts on their ends, a tool retainer comprising a plate and a retainer proper pivotally mounted on the plate, the plate having a central hole through which the head projects and side holes through which the bolts project, springs compressed between said head and plate and yieldingly holding comprising a plate supported on the cylinder for yielding movement in a rearward direction and having forwardly projecting brackets, and a retainer proper comprising a rod having parallel sides pivoted in said brackets and a U shaped central portion disposed at right angles to said sides and connected to said sides by spirals whereby said U shaped portion has a spring connection with said sides.

ERNEST PENBERTHY. 

